// JavaScript's most important datatype is the object.// An object is a collection of name/value pairs, or a string to value map.letbook = {// Objects are enclosed in curly braces.topic:"JavaScript",// The property "topic" has value "JavaScript."edition:7// The property "edition" ...
// The split function creates a new array containing each value separated by a space stringArray = concatString.split(" "); for (var i=0; i<stringArray.length;i++) { alert(stringArray[i]; } alert(newString.toUpperCase()); alert(newString.toLowerCase()); } 下面是执行上面的代码得到...
let primes = [2, 3, 5, 7]; // An array of 4 values, delimited with [ and ]. primes[0] // => 2: the first element (index 0) of the array. primes.length // => 4: how many elements in the array. primes[primes.length-1] // => 7: the last element of the array. prim...
To split a string into an array of characters, specify an empty string ("") as a separator.ExampleTry this code » let str = "INTERSTELLAR"; let strArr = str.split(""); document.write(strArr[0]); // Prints: I document.write(strArr[1]); // Prints: N document.write(strArr[...
split() Break a string into an array of substrings. Example 1: Regular Expressions const string = 'Find me'; const pattern = /me/; // search if the pattern is in string variable const result1 = string.search(pattern); console.log(result1); // 5 // replace the character with anothe...
_transform(chunk, encoding, callback) { if (typeof chunk !== "string") { callback(new Error("Expected a string but got a buffer")); return; } // Add the chunk to any previously incomplete line and break // everything into lines let lines = (this.incompleteLine + chunk).split("...
passed, as Uint8Array* objects, to this processChunk callback.** streamBody() returns a Promise that resolves to a string. If a processChunk* callback was supplied then this string is the concatenation of the values* returned by that callback. Otherwise the string is the concatenation of*...
split() Converts the string to an array of strings. substr() Returns a part of a string by taking the starting position and length of the substring. substring() Returns a part of the string from the specified start index (inclusive) to the end index (exclusive). slice() Returns a part...
let lines = contents.split('\n') // split content into array of lines let result = [] // an array of arrays where each index maps to a line // and each index within the inner array maps to the // vowel count for a word on that line ...
Use the `String.split()` method to split a string by newline, e.g. `str.split(/\r?\n/)`.